Birthday

It's my birthday today! I'm 28-years-old now. I'm waiting for your congratulations! :)

Happy Birthday, George! However, please avoid saying the last sentence. In English, it comes across as arrogant.

Birthday

Hi George, 

Happy Birthday to you. I wish you a fruitful year ahead. As Mr. Zhang rightly pointed out, the last part may sound a little pompous to some readers. I hope you do not mind me sharing about this, and of course, we know you were merely joking. I changed the last sentence, and it should sound "easier" on the ears now.

God bless you.

Cheers, 
Lance

In Russian, you use the verb поздравлять in connection with birthdays.  And any good dictionary will tell you that поздравлять means congratulate.  However, the words congratulate or congratulations are not ordinarily used for birthdays.   Something very natural would be, "Happy birthday!"  If you want to use a verb, use "wish":  "I'd like to wish you a happy birthday."  . . . "I'm 28 today, and I'm waiting for you to wish me a happy birthday!"   Of course, the previous sentence is playful.

You can use "congratulate" for a very special birthday thought of as an achievement:    "Congratulations on your turning 21, John.  Now you can legally go to bars."   .....  "Congratulations on your 90th birthday, Mr. Jones.  I hope to congratulate you again on your 100th."